{"id":"vidhyamitra:city-day:noida:1981-02-12:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/noida/1981-02-12","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1981-02-12","date_display":"February 12, 1981 CE","panchanga":{"method":"Sūrya Siddhānta + Bhāskara-II iterative manda + Kerala-school (Mādhava-Nīlakaṇṭha) evection + variation + annual equation","engine_version":"2.0 (Kerala-school enhanced)","accuracy_note":"Sub-degree on Moon at any Kali-Yuga date (~2-5° residual max)","tradition_chain":"Āryabhaṭa(499) → Brahmagupta(628) → Bhāskara II(1150) → Mādhava(~1400) → Parameśvara(1430) → Nīlakaṇṭha(1501) → this","input":{"year":1981,"month":2,"day":12,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444647.770833,"kali_year":5082,"ahargana":1856182.2708,"sun":{"sidereal_longitude":299.7833,"rashi":10,"rashi_name":"Makara"},"moon":{"sidereal_longitude":32.54,"rashi":2,"rashi_name":"Vṛṣabha"},"tithi":{"number":8,"name":"Aṣṭamī","paksha":"Śukla","full_name":"Śukla Aṣṭamī","elongation_degrees":92.7567,"elapsed_within_tithi_degrees":8.7567},"nakshatra":{"number":3,"name":"Kṛttikā","pada":2,"moon_longitude":32.54,"elapsed_within_degrees":5.8733},"yoga":{"number":25,"name":"Brahma","sum_longitude":332.3233},"karana":{"half_tithi_index":15,"name":"Bava"},"vara":{"number":6,"name":"Guruvāra (Thursday)"}},"sky":{"method":"Sūrya-Siddhāntic Bhāskara-II 4-step iteration with atan2-based śīghra + varying peripheries + lunar latitude","engine_version":"3.0 (Pūrṇa — complete SS implementation)","tradition_sources":"Āryabhaṭīya 499 CE → SS Ch.1-5 Burgess 1860 → Siddhānta-Śiromaṇi Bhāskara II 1150 → Tantrasaṅgraha Nīlakaṇṭha 1501","input":{"year":1981,"month":2,"day":12,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2444647.770833,"ahargana":1856182.2708,"kali_year":5082,"ayanamsa_lahiri":23.5892,"grahas":{"sun":{"sidereal_longitude":299.65443500000003,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":2},"retrograde":false},"moon":{"sidereal_longitude":33.51203499999997,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":3,"name":"Kṛttikā","pada":3},"retrograde":false,"latitude":-4.4013},"mars":{"sidereal_longitude":310.73093500000004,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":24,"name":"Śatabhiṣā","pada":2},"retrograde":false},"mercury":{"sidereal_longitude":310.54843500000004,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":24,"name":"Śatabhiṣā","pada":2},"retrograde":true},"jupiter":{"sidereal_longitude":166.33283499999993,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":2},"retrograde":true},"venus":{"sidereal_longitude":286.444835,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":2},"retrograde":false},"saturn":{"sidereal_longitude":165.45383500000003,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":2},"retrograde":true},"rahu":{"sidereal_longitude":110.5307,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":9,"name":"Āśleṣā","pada":2},"retrograde":false},"ketu":{"sidereal_longitude":290.5307,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":4},"retrograde":false}},"panchang":{"method":"Sūrya Siddhānta + Bhāskara-II iterative manda + Kerala-school (Mādhava-Nīlakaṇṭha) evection + variation + annual equation","engine_version":"2.0 (Kerala-school enhanced)","accuracy_note":"Sub-degree on Moon at any Kali-Yuga date (~2-5° residual max)","tradition_chain":"Āryabhaṭa(499) → Brahmagupta(628) → Bhāskara II(1150) → Mādhava(~1400) → Parameśvara(1430) → Nīlakaṇṭha(1501) → this","input":{"year":1981,"month":2,"day":12,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444647.770833,"kali_year":5082,"ahargana":1856182.2708,"sun":{"sidereal_longitude":299.7833,"rashi":10,"rashi_name":"Makara"},"moon":{"sidereal_longitude":32.54,"rashi":2,"rashi_name":"Vṛṣabha"},"tithi":{"number":8,"name":"Aṣṭamī","paksha":"Śukla","full_name":"Śukla Aṣṭamī","elongation_degrees":92.7567,"elapsed_within_tithi_degrees":8.7567},"nakshatra":{"number":3,"name":"Kṛttikā","pada":2,"moon_longitude":32.54,"elapsed_within_degrees":5.8733},"yoga":{"number":25,"name":"Brahma","sum_longitude":332.3233},"karana":{"half_tithi_index":15,"name":"Bava"},"vara":{"number":6,"name":"Guruvāra (Thursday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-4.401,"elongation":92.757},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-4.401,"opposition_distance":87.243}},"eclipse_window_40days":[{"offset_days":-7,"type":"solar","occurs":true,"moon_latitude":-0.15,"elongation":0.162}]},"city":{"slug":"noida","name":"Noida, Uttar Pradesh","lat":28.5355,"lon":77.391,"tz_offset_hours":5.5,"state":"Uttar Pradesh","country":"IN","tier":"tier-1"},"tier2":{"city":{"slug":"noida","name":"Noida, Uttar Pradesh","lat":28.5355,"lon":77.391,"tz_offset_hours":5.5,"state":"Uttar Pradesh","country":"IN","tier":"tier-1"},"sunriseLocal":"07:02","sunsetLocal":"18:08","solarNoonLocal":"12:35","dayLengthHours":11.1102085400954,"dayLengthDisplay":"11 Hours 06 Mins 37 Secs","nightLengthDisplay":"12 Hours 53 Mins 23 Secs","moonriseLocal":"12:03","moonsetLocal":"01:38","rahuKala":{"name":"Rāhu Kāla","start":"13:58","end":"15:22","startHours":13.972621602426766,"endHours":15.36139766993869,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"07:02","end":"08:25","startHours":7.028741264867141,"endHours":8.417517332379067,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"09:48","end":"11:12","startHours":9.80629339989099,"endHours":11.195069467402917,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:37","end":"09:59","startHours":9.621123257556068,"endHours":9.991463542225913,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:29","end":"07:47","startHours":7.491666620704449,"endHours":7.7879388484403265,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"12:13","end":"12:57","startHours":12.213505250244992,"endHours":12.954185819584687,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"05:33","end":"06:17","startHours":5.547380126187754,"endHours":6.288060695527448,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"06:06","end":"07:02","startHours":6.102890553192524,"endHours":7.028741264867141,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:26","end":"15:11","startHours":14.435546958264073,"endHours":15.176227527603766,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:56","end":"18:20","startHours":17.93894980496254,"endHours":18.33894980496254,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:08","end":"18:36","startHours":18.13894980496254,"endHours":18.60187516079985,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:53","end":"19:38","startHours":17.88894980496254,"endHours":19.63894980496254,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"00:13","end":"00:57","startHours":24.213505250244992,"endHours":24.954185819584687,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Śubha","start":"07:02","end":"08:25","startHours":7.028741264867141,"endHours":8.417517332379067,"quality":"auspicious"},{"name":"Roga","start":"08:25","end":"09:48","startHours":8.417517332379067,"endHours":9.80629339989099,"quality":"inauspicious"},{"name":"Udveg","start":"09:48","end":"11:12","startHours":9.80629339989099,"endHours":11.195069467402917,"quality":"inauspicious"},{"name":"Chala","start":"11:12","end":"12:35","startHours":11.195069467402917,"endHours":12.58384553491484,"quality":"neutral"},{"name":"Labha","start":"12:35","end":"13:58","startHours":12.58384553491484,"endHours":13.972621602426766,"quality":"auspicious"},{"name":"Amṛta","start":"13:58","end":"15:22","startHours":13.972621602426766,"endHours":15.36139766993869,"quality":"auspicious"},{"name":"Kāla","start":"15:22","end":"16:45","startHours":15.36139766993869,"endHours":16.750173737450616,"quality":"inauspicious"},{"name":"Śubha","start":"16:45","end":"18:08","startHours":16.750173737450616,"endHours":18.13894980496254,"quality":"auspicious"}],"nightChoghadiyas":[{"name":"Amṛta","start":"18:08","end":"19:45","startHours":18.13894980496254,"endHours":19.750173737450616,"quality":"auspicious"},{"name":"Kāla","start":"19:45","end":"21:22","startHours":19.750173737450616,"endHours":21.36139766993869,"quality":"inauspicious"},{"name":"Śubha","start":"21:22","end":"22:58","startHours":21.36139766993869,"endHours":22.972621602426763,"quality":"auspicious"},{"name":"Roga","start":"22:58","end":"00:35","startHours":22.972621602426763,"endHours":24.58384553491484,"quality":"inauspicious"},{"name":"Udveg","start":"00:35","end":"02:12","startHours":24.58384553491484,"endHours":26.195069467402917,"quality":"inauspicious"},{"name":"Chala","start":"02:12","end":"03:48","startHours":26.195069467402917,"endHours":27.80629339989099,"quality":"neutral"},{"name":"Labha","start":"03:48","end":"05:25","startHours":27.80629339989099,"endHours":29.417517332379063,"quality":"auspicious"},{"name":"Amṛta","start":"05:25","end":"07:02","startHours":29.417517332379063,"endHours":31.02874126486714,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"07:02","end":"08:02","startHours":7.028741264867141,"endHours":8.02874126486714,"planetary_lord":"Jupiter"},{"name":"Hora 2","start":"08:02","end":"09:02","startHours":8.02874126486714,"endHours":9.02874126486714,"planetary_lord":"Saturn"},{"name":"Hora 3","start":"09:02","end":"10:02","startHours":9.02874126486714,"endHours":10.02874126486714,"planetary_lord":"Moon"},{"name":"Hora 4","start":"10:02","end":"11:02","startHours":10.02874126486714,"endHours":11.02874126486714,"planetary_lord":"Mercury"},{"name":"Hora 5","start":"11:02","end":"12:02","startHours":11.02874126486714,"endHours":12.02874126486714,"planetary_lord":"Venus"},{"name":"Hora 6","start":"12:02","end":"13:02","startHours":12.02874126486714,"endHours":13.02874126486714,"planetary_lord":"Sun"},{"name":"Hora 7","start":"13:02","end":"14:02","startHours":13.02874126486714,"endHours":14.02874126486714,"planetary_lord":"Mars"},{"name":"Hora 8","start":"14:02","end":"15:02","startHours":14.02874126486714,"endHours":15.02874126486714,"planetary_lord":"Jupiter"},{"name":"Hora 9","start":"15:02","end":"16:02","startHours":15.02874126486714,"endHours":16.02874126486714,"planetary_lord":"Saturn"},{"name":"Hora 10","start":"16:02","end":"17:02","startHours":16.02874126486714,"endHours":17.02874126486714,"planetary_lord":"Moon"},{"name":"Hora 11","start":"17:02","end":"18:02","startHours":17.02874126486714,"endHours":18.02874126486714,"planetary_lord":"Mercury"},{"name":"Hora 12","start":"18:02","end":"19:02","startHours":18.02874126486714,"endHours":19.02874126486714,"planetary_lord":"Venus"},{"name":"Hora 13","start":"19:02","end":"20:02","startHours":19.02874126486714,"endHours":20.02874126486714,"planetary_lord":"Sun"},{"name":"Hora 14","start":"20:02","end":"21:02","startHours":20.02874126486714,"endHours":21.02874126486714,"planetary_lord":"Mars"},{"name":"Hora 15","start":"21:02","end":"22:02","startHours":21.02874126486714,"endHours":22.02874126486714,"planetary_lord":"Jupiter"},{"name":"Hora 16","start":"22:02","end":"23:02","startHours":22.02874126486714,"endHours":23.02874126486714,"planetary_lord":"Saturn"},{"name":"Hora 17","start":"23:02","end":"00:02","startHours":23.02874126486714,"endHours":24.02874126486714,"planetary_lord":"Moon"},{"name":"Hora 18","start":"00:02","end":"01:02","startHours":24.02874126486714,"endHours":25.02874126486714,"planetary_lord":"Mercury"},{"name":"Hora 19","start":"01:02","end":"02:02","startHours":25.02874126486714,"endHours":26.02874126486714,"planetary_lord":"Venus"},{"name":"Hora 20","start":"02:02","end":"03:02","startHours":26.02874126486714,"endHours":27.02874126486714,"planetary_lord":"Sun"},{"name":"Hora 21","start":"03:02","end":"04:02","startHours":27.02874126486714,"endHours":28.02874126486714,"planetary_lord":"Mars"},{"name":"Hora 22","start":"04:02","end":"05:02","startHours":28.02874126486714,"endHours":29.02874126486714,"planetary_lord":"Jupiter"},{"name":"Hora 23","start":"05:02","end":"06:02","startHours":29.02874126486714,"endHours":30.02874126486714,"planetary_lord":"Saturn"},{"name":"Hora 24","start":"06:02","end":"07:02","startHours":30.02874126486714,"endHours":31.02874126486714,"planetary_lord":"Moon"}],"taraBala":{"favorable_nakshatras":["Rohiṇī","Mṛgaśirā","Ārdrā","Punarvasu","Puṣya","Hasta","Citrā","Svātī","Viśākhā","Anurādhā","Śravaṇa","Dhaniṣṭhā","Śatabhiṣaj","Pūrva Bhādrapadā","Uttara Bhādrapadā"],"unfavorable_nakshatras":["Aśvinī","Bharaṇī","Kṛttikā","Aśleṣā","Maghā","Pūrva Phalgunī","Uttara Phalgunī","Jyeṣṭhā","Mūla","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Revatī"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Vṛṣabha","Karka","Tulā","Vṛścika","Kumbha","Mīna"],"unfavorable_rashis":["Meṣa","Mithuna","Siṃha","Kanyā","Dhanu","Makara"]},"dishaShool":"South (Dakṣiṇa)","chandraVasa":"South-East","rahuVasa":"North-West","anandadiYoga":{"name":"Siddhi","quality":"Auspicious"},"tropicalRitu":"Śiśira (Winter) (tropical)","vedicRitu":"Hemanta (Pre-winter)","tropicalAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":-13.769031191900837,"eotMinutes":-14.594732094890398,"ayanamsa":23.5892}},"calendars":{"vikram_samvat":2038,"vikram_samvatsara":"Bhāva","saka_samvat":1903,"saka_samvatsara":"Durmati","bengali_samvat":1388,"malayalam_era":1157,"nanakshahi_year":512,"lunar_month":"Māgha","lunar_month_paksha_full":"Māgha Śukla Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Māgha","lunar_month_amanta":"Māgha","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Makara (Tai)","ritu":"Śiśira (Winter)","display_summary":"Māgha Śukla Aṣṭamī · Vikram 2038 Bhāva · Śaka 1903 Durmati"},"festivals":[{"id":"bhishma-ashtami","name":"Bhīṣmāṣṭamī","name_sanskrit":"भीष्माष्टमी","tradition":"Pan-Hindu","associated_deity":"Bhīṣma Pitāmaha","significance":"Bhīṣma's mahaprasthāna anniversary (Māgha Śukla 8); Bhīṣma-tarpaṇa.","vrata":true,"detection":{"tithi_number":8,"tithi_paksha":"Śukla","lunar_month":"Māgha"},"precedence":2,"sources":["Mahābhārata, Anuśāsana Parva"]},{"id":"kumbha-sankranti","name":"Kumbha Saṅkrānti","name_sanskrit":"कुम्भ सङ्क्रान्ति","tradition":"Pan-Hindu","associated_deity":"Sūrya Bhagavān","significance":"Sun enters Aquarius; Kumbha-māsa begins.","vrata":false,"detection":{"sun_rashi_ingress":"Kumbha"},"precedence":5}],"todays_walk":{"walk":{"id":"guru-walk","name":"Bṛhaspati Walk","name_sanskrit":"गुरु यात्रा","type":"graha","description":"Wisdom transmission + BG 4.34.","step_count":8,"url":"/walk/guru-walk"},"reason":"Guruvāra (Thursday) — its presiding graha's walk."},"cosmic_resonances":[{"historical_date":"-3137-12-25","event":"Bhīṣma's Mahaprasthan","chart_id":"bhishma","shared_marker":"same Śukla Aṣṭamī + Kṛttikā","url":"/day/-3137-12-25","relevance":1},{"historical_date":"-3137-10-04","event":"Mahābhārata Day 1 (Bhagavad Gītā delivered)","chart_id":"krishna","shared_marker":"same Kṛttikā","url":"/day/-3137-10-04","relevance":0.5}]},"validity":{"eternal":false,"location_specific":"noida"},"liturgical":{"opening":"जय श्री कृष्ण","closing":"ॐ तत् सत्","attribution":"Computed by Vidhyamitra Sūrya-Siddhānta substrate + Vidhyamitra Tier-2 layer"},"seo":{"title":"Pañchāṅga February 12, 1981 CE · Noida, Uttar Pradesh · Vidhyamitra","description":"February 12, 1981 CE for Noida, Uttar Pradesh: Śukla Aṣṭamī, sūryodaya 07:02, sūryāsta 18:08.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/noida/1981-02-12","hreflang_alternates":{"en":"https://vidhyamitra.com/city/noida/1981-02-12","sa":"https://sa.vidhyamitra.com/city/noida/1981-02-12","hi":"https://hi.vidhyamitra.com/city/noida/1981-02-12","x-default":"https://vidhyamitra.com/city/noida/1981-02-12"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-31T20:54:08.995Z","verification":{"type":"multi-marker","confidence":"canonical"}},{"pillar":"Vidhyamitra-Tier2","pillar_version":"0.1.0","method":"Spherical astronomy + Lahiri ayanamsa + standard solar declination + EoT correction","retrieved_at":"2026-05-31T20:54:08.995Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-31T20:54:08.995Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}